Unfortunately, Google now requires payment information for all API generation. Though if you don’t meet the criteria for the charges, you wont be charged. Create your billing account with Google, and then configure your API settings

After giving your billing information, configure the API with the URL of the site that you’re using Google Maps for. Generate the API, and copy it.

Paste it in Theme Options> Misc Settings and hit “Save Changes.”

Check your contact page (if you’ve got a map configured there) or anywhere on your site that’s using a Google Map. Your inputted address should be reflected on your map.

If you need to edit any of your Google Map API’s, you can delete, rename, and adjust the security settings of each one here: